Buffer.



D. D. GORDON.

BUFFBB..

rrmoulon HLBD 1mm 28, 1910.

1,072,847 Patented Sept. 9, 1913.

UNITED STATES PATENT OFFICE.

.DAVID D. GonDoN, or' CHICAGO, ILLINoIs, AssIoNon vor oNE-HALri'ro ,RELIABL ELECTRIC COMPANY, or CHICAGO, ILLINoIs, coRPoRATIoNoF ILLINoIs.

BUFFE.

Speclfication of Letters Patent.

Patented Sept. 9,1913.

To all 'whom t may concem:

Be it known that I, DAVID D. GoRDoN, a subject of the Emperor of Germany, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Buffers, of which the following is a. full, clear, ooncise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to buffers, and has for its object the provision of an improved, portable bufiing device which can be used on the work bench and whose portable features make it available for a great many uses such as an automobile where buflers of the ordinary type, have been found inapplicable.

My invention contempla-tes' a motor having a suitable handle attached thereto by means of .which it can be held, and whichhandle at the same time serves for leading in the connecting cord devices to supply current to the motor. At the opposite extremity of the motor a suitable support is provided, within which a shaft is mounted which carries the bufer, and interposed between this bufl`erand the rigid shaft of the motor is a flexible device which furnishes 'the necessary elasticity and resilience so that the buifer in its operation'can adjust itself to the material upon which it. is workmg.

I will describe my invention more in detail by reference to the accompanying drawings illustrating the preferred embodiment thereof, in which,--

Figure 1 is a longitudinal, sectional view of my improved portable bufi'er; F ig. 2 i's a detail view of the motor; and Fig. 3 is an end view .with the handle removed, showing the brush connecting and electrical connecting devices. g

Referring to the figures, I show a motor having a field structure 1 of suitable laminations, which` field structure is provided with Operating coils 2, 8, which coils are connected in series with a rotatably mount-l ed armature 4:. The armature shaft 5 is journaled in bearings 6 and 7. A commu- .tator 8 is provided :for the motor, which, in

connection with the brushes 9, 9 held in place by suitable springs 10, furnishes currentto the motor through the agency of the flexible cord 1'1 adapted to pass out through the hole 12 in the handle 13. The field structure of the motor carries an end plate 14 to which the handle is attached, and-c this end plate likewise carries the journal 7, and also a plate 15 mounted ,thereom which carries the two brushes and binding posts 16, 16. The flexible cord 11 is connected to these binding posts 16. A second end plate 17 is also supported by the field structure 1, all through the agency of the bolts 18 and the nuts 19. Inclosing plates 20 are provided to form a homog'eneous exterior for the motor portion of the device. The end plate 17 carries the journal 6 which supports the moto-r shaft, and also has a bearing 21 which supports the bufiing shaft 22. The bufi'er shaft is mounted by means of a key 28 upon the armature shaft 5, a spring 24 being interposed to push the shaft 22 outwardly, as will be apparent. The shaft 22 is thereby permitted to be pushed inwardly When in operation by extra pressure exerted When the tool is in operation. A bufling wheel 25 is mounted on the shaft 22 through the agency of the nut 26, which bufling wheel may be of any desired characteristics to accomplish the work for which it is intended.

It will be scen from the construction thus described that I have provided a portablc, yielding bufling device whose simplicity makes it applicable for use on small pieces of work, and which is so-constructed that the parts thereof are rigidly secured togethcr so as to render lthem less likely to become disarranged. The yielding connection between the bufing shaft and the motor shaft is of great importance, notionly to permit the bufling wheel' 25 to accommodate itself to the work, but also to prevent jars against' the motor, and thus to keep it properly operating.

V'Vhile I have herein shown and particularly described the prefe'rred, embodiment of niy invention, I do not limit myself to the precise construction and arrangement as herein set forth; but y Having thus described its most salient features, what I claim as new and desire to secure by Letters Patent is:

1. A portable device of the character described comprising a motor havingfa laminated field structure and an armature, boitsto lock the laminations together, end platesl forming part of a motor casing carried by said bolts, bearings in said end piates to support. said armature, side Walls to com- 'plete said casing carried by said end plates, a handle mounted upon one end plate eforesaid, an insulating bridge carried by said end plate, brushes carried by said bridge, terminale carried by said bridge, and flexible eonnections for said terminale leading out through said handle.

2. A por-table device of the Character describedcomprising a motor having a laminat'ed field structure and en armatnre, bolts to 'lock the laminations together, end plates. forming p'art of a' motor casing carried by said bolts, bearings in said end plate-s to support said armature, side Walls to complete said easing carried by said end piates, av 1nendie mounted upon one end ;plate efore said, en insulet-ing bridge carried by said end plate, brushes cerried by Said bridge, meansy carried by Said bridge adapted to thrust said brushes longitudinaly of said handle, terminale carried by' id bridge, and fiexibie oonneetions for eeloi terminale leading out through Mid hendie.

In Witness whereof, Ihereunto snigiscribe my name this 26th day of June A. D. 191i).

DAV 1D G-ORDN.

Witnesses: HAZEL JONES,

A. LYDA JONES. 

